Database Users

[Q] Battery Meter on Mango Inaccurate?

So i recently flashed CleanDFT ROM, first couple of days the meter read out 1 day and 18 hours which im very surprised then it went down to 1 day and 4 hours, now this morning i unplugged and it tells me i got 19 hours left from full charge, should i go by this? or is there something wrong?

hello can you help me wid flashing...i came from android...no idea of how to do it...

cyril008 said:
hello can you help me wid flashing...i came from android...no idea of how to do it...
Click to expand...
Click to collapse
Redirecting you to the right place.

If you have just flashed a new rom, in general, you need to go through a couple of battery cycles before the battery read can be accurate. I remember when flashing my ATT FUze I had to wait 2-3 complete charging cycles ie. discharging battery to 10% and charging back to full before I could get accurate reading. If you are experiencing worse battery time than before flashing after 2-3 cycles you might need to reflash the rom; you should see better battery time with custom roms, so I have heard.
I also wouldn't go by the battery saver timing, I would go by wpbench or real time use to get an accurate reading on battery time. I have a 1800 mah battery in my focus and it reads 24 hours on battery life

As far as i know, doesnt all the ROMs have basically the same battery life?
Ill be going out of town sometime this week and ill be out most of the day, i need a rom thatll at least last a whole 12 to 14 hours at the most or whole day at best of just occasional twittering and occasional checks on facebook and probably capture some pictures and a video and maybe an hour at most on music? im sure this phone can handle it but idk what you guys suggest

I have the same issue with ATT samsung focus with Roger latest updates, the battery meter is just not accurate, sometimes full and just reboot upon eject from the micro usb. The battery was fine until recently. Found a few other with the same issue online, no solution available yet.
*pulling out battery doesn't work*

The solution is exactly the same as it is on a laptop.
Lithium ion batteries, and, actually, come to think of it, pretty all rechargeable batteries lose capacity over time. The phone, to begin with, doesn't have a good idea of how much capacity is left, and it has to estimate based on previous performance. This is partially a result of battery manufacturers going as cheap as possible with the circuitry in lithium ion batteries.
The phone needs to figure out how old your battery is. This data is definitely lost with a new rom. Leave it to charge overnight, then unplug it and let the battery run all the way to dead. Charge it again, and your battery percentages should be correct. It may take more than one cycle, but the meter should settle into a correct estimate eventually.

Incorrect battery stats are a possible reason for fluctuations in battery life and reseting them as described in the previous post can help.
Another thing which you can do is use an app like this http://forum.xda-developers.com/showthread.php?t=1328730 to check the reported mV rating of your battery at full charge. That can serve as an indicator of the battery life you can expect with your current battery stats.

My battery life is bad

I will try install many roms and in all the battery life is bad.
CloudyG2 3.3 and 2.2 and more...
What can I do? I have LG G2 two years.

Change battery, I also have that problem , and only fix is replacing battery..
Sorry on bad english

Another help? I dont want replace my battery.

saarxee said:
Another help? I dont want replace my battery.
Click to expand...
Click to collapse
Remove all apps you don't need. Install wakelock detector to see what is consuming battery on your device Then disable them using greenify or servicely . You can also run this script http://forum.xda-developers.com/lg-g2/general/guide-reducing-google-play-services-t3139032 .
Remove extra bloatware , avoid using wifi , reduce screen brightness .. or go back to kitkat.
I would rather suggest to change your battery dude, 2 years for a mobile battery is more than enough.

Only apps was installed on my device is WhatsApp, facebook, Instagram and Greenify.
Yesterday I downgrade to KitKat and the battery very bad (Cloudy 2.2)

Same problem here : http://forum.xda-developers.com/lg-g2/help/lg-g2-d802-battery-draining-5-0-2-t3256313/

I also got bad battery life with all LG lollipop rom and stock kitkat , but I get terrific battery life with cloudy g2 2.2. Like 6.5 hours of SOT. Just make sure you clean flash and reduce background app by clearing recent apps.

Are there any apps that show the battery Wear level
Sent from my SM-N920C using Tapatalk

Mr.201 said:
I also got bad battery life with all LG lollipop rom and stock kitkat , but I get terrific battery life with cloudy g2 2.2. Like 6.5 hours of SOT. Just make sure you clean flash and reduce background app by clearing recent apps.
Click to expand...
Click to collapse
6.5 hours?!?! Are you sure?
1.5 to 2 hours of SOT is the most I can get out of my two-week-old G2.
I bought is from a "mobile shop" on aliexpress.
Yes, it is refurbished... ,it looked like brand new on the outside.
... however, when I disconnect it from the charger in the morning (7 am) a few hours, and a few phone calls later it is already at 85%
at noon there is 65% left.
at the evening - somewhere around 22h - the battery usually dies completely ...
14-15 hours of usage on battery... NO games, NO Youtube videos.
Max 30 minutes browsing the news (on WiFi)... and an hour of phone calls (city center, so no problem with reception...)
When the screen is on (btw. I set it to 70% brightness) I can literally see the battery percentage indicator decrease every few minutes...
Looks like I got a phone with bad battery... didn't I?
I'm on KitKat (4.4.2 stock) D802 version...

I had this problem on my freedompop(sprint) "refurbished" phone. Even though it looked like new on the outside, I would only get 2-3hrs sot. After replacing the battery I now get more than double that. Factory reset, disable/uninstall the apps you don't need, and only install the apps you do need. If you still get bad battery life then the only option is a new battery.
Btw, a custom rom will NOT give you significantly better sot unless it severely cuts performance and lcd brightness.

13x025 said:
6.5 hours?!?! Are you sure?
1.5 to 2 hours of SOT is the most I can get out of my two-week-old G2.
I bought is from a "mobile shop" on aliexpress.
Yes, it is refurbished... ,it looked like brand new on the outside.
... however, when I disconnect it from the charger in the morning (7 am) a few hours, and a few phone calls later it is already at 85%
at noon there is 65% left.
at the evening - somewhere around 22h - the battery usually dies completely ...
14-15 hours of usage on battery... NO games, NO Youtube videos.
Max 30 minutes browsing the news (on WiFi)... and an hour of phone calls (city center, so no problem with reception...)
When the screen is on (btw. I set it to 70% brightness) I can literally see the battery percentage indicator decrease every few minutes...
Looks like I got a phone with bad battery... didn't I?
I'm on KitKat (4.4.2 stock) D802 version...
Click to expand...
Click to collapse
Well if you are using kitkat then i must say you got a faulty or old old battery . G2 on kitkat is/was a beast , I can recall those days when i used to get 7+ hrs sot on kitkat . you should call or email to your seller and tell them the problem you are facing.

After sorting through potential power draining apps etc.. You could try a battery calibrator of some sort. I used one and a big difference noticed, however after it's fully charged in the morning I take it off the charger and leave it sit there for at least 30 mins without touching it and battery life is even better.

Thank you all for your answers.
In the mean time I installed this Battery Monitor Widget.... and it gives me some "interesting" readings:
1. my phone charges ridiculously fast. From 37% to 100% in 70-80 minutes... Connected to the charger at 00:04. At 01:14 it was already at 99% (This widget gathers info every 10 minutes)
https://goo.gl/photos/DDerdsk2mSdKipMt7
...and it charges with an insane amount of current (over 2100 mA)
https://goo.gl/photos/VJd7iUFMm5A4s3UeA
2. there are some kind of "spikes" in battery usage, but after a few minutes the battery seems to recover...
this is the battery voltage statistics:
https://goo.gl/photos/Uh96utz1aBJNV3qCA
So, It is more and more evident, I got a faulty battery...
Now, only if I could know where to buy a GENUINE LG battery...
Aliexpress is full of "shops" claiming they are selling "original" LG batteries, however there are quite a few negative reviews about them... (batteries are lighter, thinner, deteriorating fast... etc.)

Note 4 N910C - Extended Battery Calibration Issue

Hello everyone.
(Please excuse my lengthy post, I had a lot of details to share. Thanks!)
So I recently bought N910C from a guy in Dubai, who gave me an extended 8500mah battery along with it, and claimed that it would last me 3 days easily (though later he claimed that it runs a day on full use, and 2 days no mild usage. Also claimed that standard 3220mah battery lasts less than 6 hours) but 8500mah would take around 6 hours to charge (it takes me 1.5 max, does 1% in a minute, with quick charger). I was however instructed to calibrate the battery properly, which I did, twice, tried the manual (draining and full charging) method, and also tried two apps: Battery Calibration and Battery HD.
Facts:
After buying, I flashed marshmallow stock rom for N910C and rooted with CF-Autoroot.
I have been using its own fast charger throughout, not the standard charger.
Here is the problem:
Before rooting and changing the rom, the battery was barely lasting and would shut down when around 30%. So I rooted the phone and did the calibration (manual+Battery calibration app), but the battery timing remained the same, or maybe increased slightly. The good thing was that it did not shut down at 30% and went down to 1%, where it stuck for good 15 minutes (with me browsing the net).
After I recharged it, I tried Battery HD app, which ran tests and gave me the following figures of battery usage:
30 minutes on internet: 5%
30 minutes on video: 6%
30 minutes on music: 2%
After this process, the battery again collapsed in its 30s%. I tried the battery calibration method again, but no luck now, battery collapses in its 30s. The guy who I purchased it from keeps sharing the snapshot and claims it was working fine before.
Now my questions:
I read some guides, including topics on XDA that suggested that Exynos drains more than snapdragon. So should I try to make a switch to a variant of note 4 with snapdragon, or would that make no major difference?
Is this battery faulty and I should change it? the Seller claims that he had to come on to an extended battery cause the standard was ****, so I shouldn't try and get another, it would be a waste.
What could be the problem if the battery falls in 30s% even after calibration, with exception to that one time?
Also, when it collapses in its 30s and I put it to charge, the screen shows "charging at 45%", why is that?
Lastly, I read here on xda that zerolemon extended batteries require the standard charger as the quick charger would give **** time and would charge them quickly. Will that apply to me as well? Although my battery isn't zerolemon, it's some unknown brand. And it seemingly charges quite quickly with the regular charger as well (when the phone is turned off).
He claimed that it should take my phone 6 hours to charge, it takes me barely 1.5 hours even on the extended battery, is there something I am doing wrong?
If you went through all of what I wrote, thank you for being so patient! So now, do I have any hope with this phone or should I just sell it off and maybe get an AT&T or T-mobile variant?
Thanks in advance for the guidance to come. I'll keep updating this post with whatever other tests I run, and the progress.
Khurram

Sounds like the battery is faulty. ...try another one if possible

tiguy99 said:
Sounds like the battery is faulty. ...try another one if possible
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Click to collapse
That's what I am trying to do, if only I can find someone's spare to try out lol.
p.s. you signature, lol I have the same three phones with the same status, except that my G3 (which is also white) is in a coma and G2 is up for grabs.

pistavampire said:
That's what I am trying to do, if only I can find someone's spare to try out lol.
p.s. you signature, lol I have the same three phones with the same status, except that my G3 (which is also white) is in a coma and G2 is up for grabs.
Click to expand...
Click to collapse
Lol!

Note 4 Battery Problems

Hi everyone!
I got a Note 4 a few days ago and it has battery issues.
I got it second hand online from a guy I don't know. I'm from Romania, I think the phone is from the UK, it's Verizon branded. The model is SM-N910V and the Android version is 6.0.1. It's not rooted. I noticed this V version isn't very common.
The battery that came with it was pretty poor, it would drain in a few hours with minimal usage and the worst problem is the phone would suddenly shut down at about 30-35% battery life. Then it would go into a booting loop, without being able to actually boot until I plugged it in.
I bought a new genuine battery from a popular online store here (F64), battery life is better, but still with just wifi, it went to 50% in about 2 hours of browsing. Without wifi or data (very little), it lasted for a day and a half. But the phone suddenly shut down at 8% battery life, again going into a booting loop, without being able to actually boot until I plugged it in. I'd also like to mention, when the new battery came, it only had 4% battery life left (I heard they should come about half charged, is that true?) and also there were a few reviews from people who had to try multiple batteries from this store until they got lucky with a good one. Both the old and the new batteries look identical, I don't see any signs of counterfeit.
Should I return the battery and try a new one? Is there a chance there's something wrong with the device itself?
Thank you very much!

Common problem.
Sent from my SM-N930F using Tapatalk

a602820922 said:
Common problem.
Sent from my SM-N930F using Tapatalk
Click to expand...
Click to collapse
I noticed that. Any solution?
My real fear is if there's something wrong with the device, because I can't return it.

carabus1206 said:
Hi everyone!
I got a Note 4 a few days ago and it has battery issues.
I got it second hand online from a guy I don't know. I'm from Romania, I think the phone is from the UK, it's Verizon branded. The model is SM-N910V and the Android version is 6.0.1. It's not rooted. I noticed this V version isn't very common.
The battery that came with it was pretty poor, it would drain in a few hours with minimal usage and the worst problem is the phone would suddenly shut down at about 30-35% battery life. Then it would go into a booting loop, without being able to actually boot until I plugged it in.
I bought a new genuine battery from a popular online store here (F64), battery life is better, but still with just wifi, it went to 50% in about 2 hours of browsing. Without wifi or data (very little), it lasted for a day and a half. But the phone suddenly shut down at 8% battery life, again going into a booting loop, without being able to actually boot until I plugged it in. I'd also like to mention, when the new battery came, it only had 4% battery life left (I heard they should come about half charged, is that true?) and also there were a few reviews from people who had to try multiple batteries from this store until they got lucky with a good one. Both the old and the new batteries look identical, I don't see any signs of counterfeit.
Should I return the battery and try a new one? Is there a chance there's something wrong with the device itself?
Thank you very much!
Click to expand...
Click to collapse
Return the battery.
The seller store the battery in a very poor way.
Lithium should be kept at around 40% charged if you store it for a long time (more than 1 month)
I have 5 batteries with me, 3 of them are considered broken (70 - 60% left)
The last 2 are still in very good condition, around 98 - 99%
About your device, you will need around a few days of charge cycle with a good battery.

d4rkkn16ht said:
Return the battery.
The seller store the battery in a very poor way.
Lithium should be kept at around 40% charged if you store it for a long time (more than 1 month)
I have 5 batteries with me, 3 of them are considered broken (70 - 60% left)
The last 2 are still in very good condition, around 98 - 99%
About your device, you will need around a few days of charge cycle with a good battery.
Click to expand...
Click to collapse
Thanks for your answer. I didn't know batteries for this phone are so problematic.
I just charged it to 100% slowly from my PC, will use it normally and see how much the battery lasts and if it shuts down again. As I went through forums, some people say I need to do battery calibration. If it's still bad, I'll return it.
Thanks again!

Try to get a battery direct from Samsung. Failing that buy a PowerBear or Anker. Do a factory reset and calibrate your battery by fully charging it, then running it down to 0% (if it shuts down, keep turning back on until it won't turn on). Then charge fully back to 100% again - DO NOT USE FAST CHARGE.

Kinsman-UK said:
Try to get a battery direct from Samsung. Failing that buy a PowerBear or Anker. Do a factory reset and calibrate your battery by fully charging it, then running it down to 0% (if it shuts down, keep turning back on until it won't turn on). Then charge fully back to 100% again - DO NOT USE FAST CHARGE.
Click to expand...
Click to collapse
I will look for a store somewhere. I don't think I can find those two brands here.
I did a factory reset when I bought it a few days ago, but that was with the old battery. Will do the factory reset after I drain it to 0% later today.
I don't have a 'fast charge' charger, and I have it disabled in settings.
Thank you for your response!

carabus1206 said:
Thanks for your answer. I didn't know batteries for this phone are so problematic.
I just charged it to 100% slowly from my PC, will use it normally and see how much the battery lasts and if it shuts down again. As I went through forums, some people say I need to do battery calibration. If it's still bad, I'll return it.
Thanks again!
Click to expand...
Click to collapse
carabus1206 said:
I will look for a store somewhere. I don't think I can find those two brands here.
I did a factory reset when I bought it a few days ago, but that was with the old battery. Will do the factory reset after I drain it to 0% later today.
I don't have a 'fast charge' charger, and I have it disabled in settings.
Thank you for your response!
Click to expand...
Click to collapse
What I said before is for all phone that uses Lithium Battery.
Lithium Battery must be kept in a storage at around 40 - 80% charged & must avoid hot places if you don't use it for a long time.
Draining Lithium Battery to 0% will deteriorate the battery faster so it's a big NO.
Calibration is done on the phone not the battery.
Delete "batterystats.bin" to calibrate the battery gauge.
Calibration is useless if the battery is bad (you received it at 0% it means that the storage condition is bad thus the battery is bad.
Charging from PC is a BIG NO as USB port on PC only provide around 500mAh & usually it's unstable.
The charging rate is too low & it could deteriorate the battery faster too.
And the last....I think factory reset doesn't necessary reset the batterystats.bin, so you have to delete it manually if you are rooted or follow this link if you are not rooted.

d4rkkn16ht said:
What I said before is for all phone that uses Lithium Battery.
Lithium Battery must be kept in a storage at around 40 - 80% charged & must avoid hot places if you don't use it for a long time.
Draining Lithium Battery to 0% will deteriorate the battery faster so it's a big NO.
Calibration is done on the phone not the battery.
Delete "batterystats.bin" to calibrate the battery gauge.
Calibration is useless if the battery is bad (you received it at 0% it means that the storage condition is bad thus the battery is bad.
Charging from PC is a BIG NO as USB port on PC only provide around 500mAh & usually it's unstable.
The charging rate is too low & it could deteriorate the battery faster too.
And the last....I think factory reset doesn't necessary reset the batterystats.bin, so you have to delete it manually if you are rooted or follow this link if you are not rooted.
Click to expand...
Click to collapse
Thank you very much! I will reply with updates soon!

I had a similar problems, and I have received my new battery yesterday which has been charged in 51% so I drained it to 1%-0% without unexpected shutting downs, I have charged it again and so far it seems to be ok
Sent from my SM-N930F using Tapatalk
---------- Post added at 03:05 PM ---------- Previous post was at 02:58 PM ----------
d4rkkn16ht said:
Delete "batterystats.bin" to calibrate the battery
Click to expand...
Click to collapse
Can you tell me where it is? In which folder
Sent from my SM-N930F using Tapatalk

carabus1206 said:
Thank you very much! I will reply with updates soon!
Click to expand...
Click to collapse
Hi, I didn't return the new battery after all, I think it 'calibrated' itself after the first charge. Also it goes from 100% to 1% and shuts down properly now.
I did two tests on full battery:
- barely using it, no wifi, data etc, just a few short calls (probably 30 mins of OST) and it lasted almost 6 days
- stress test, wifi and data on, gps with maps and waze on, maximum brightness and and a very long youtube video playing constantly (screen on) and it lasted about 5 hours and 30 mins
In normal use it lasts me about 2 days, but it slightly worries me that if I keep mobile data on all the time it only lasts until the end of the first day.
Would this be considered a good battery life for the Note4?
Thanks to everyone for replying and helping!!

battery percentage is inaccurate -help- [SOLVED]

hello friends ,i got a new battery (it seems original) and installed it but i have weird problems with the percentage that the phone shows .
-the battery lasts for 9h sot even with some benchmarks on latest pie ob ,so its definitely not bad
-the problem is that when it gets to 10% then it goes 9 8 7.. till 0% in about 5 minutes and then shuts off with a dead battery screen .
-i noticed that the phone still charges when it reaches 100% charges at 1 amp and gets to 0 amps after 20 minutes ,i also noticed that the idle/screen off drain is very very low ,it probably has to do something with the battery calibration
i tried:
going full stock with stock recovery but the issue persists,
doing some all night power off charges to 100%
searched most of the threads everywhere ,but no one has an exact answer .
is there any way i can access the discharging algorithm so i can tweak it ,or if is a way to teach it be more precise?
thanks so much for everyone willing to help ,sory for the long post ,i wanted to be as precise as possible i can provide everything you ask for to fix it .
p.s. i study electrical engineering so be free to use scientific terms.

steve-fox said:
hello friends ,i got a new battery (it seems original) and installed it but i have weird problems with the percentage that the phone shows .
-the battery lasts for 9h sot even with some benchmarks on latest pie ob ,so its definitely not bad
-the problem is that when it gets to 10% then it goes 9 8 7.. till 0% in about 5 minutes and then shuts off with a dead battery screen .
-i noticed that the phone still charges when it reaches 100% charges at 1 amp and gets to 0 amps after 20 minutes ,i also noticed that the idle/screen off drain is very very low ,it probably has to do something with the battery calibration
i tried:
going full stock with stock recovery but the issue persists,
doing some all night power off charges to 100%
searched most of the threads everywhere ,but no one has an exact answer .
is there any way i can access the discharging algorithm so i can tweak it ,or if is a way to teach it be more precise?
thanks so much for everyone willing to help ,sory for the long post ,i wanted to be as precise as possible i can provide everything you ask for to fix it .
p.s. i study electrical engineering so be free to use scientific terms.
Click to expand...
Click to collapse
Not a solution, but just keep the battery level above 10%
9h sot is very good with a battery you don't know if it's original or not

strongst said:
Not a solution, but just keep the battery level above 10%
9h sot is very good with a battery you don't know if it's original or not
Click to expand...
Click to collapse
it was 9 sot hours with 3 hours of geekbench battery test (about 14%/hour lost) without any tweaks at all , completely stock ... that's the reason i am trying to fix this issue,the performance is insane ..(every calibration app shows at least 99% health,it even recharges way faster that the old one ,3.8A 10 to 100 in 45 minutes) if it wasn't that i would swap it back with the stock ..

steve-fox said:
it was 9 sot hours with 3 hours of geekbench battery test (about 14%/hour lost) without any tweaks at all , completely stock ... that's the reason i am trying to fix this issue,the performance is insane ..(every calibration app shows at least 99% health,it even recharges way faster that the old one ,3.8A 10 to 100 in 45 minutes) if it wasn't that i would swap it back with the stock ..
Click to expand...
Click to collapse
Technically you want to avoid the battery dropping below 20% anyway (If you believe the words from Samsung) so it shouldn't really be an issue.
One thing you can try though is to install L Speed from the play store (require root) and use the battery calibration tool to see if that helps. Outside of this I cant really think of any thing else other than to just deal with it as is.

i figured it out guys...the thermistor in the battery was dead , i though a solution for anyone face the same problem ,desolder the control board from the original battery then solder it to the new one ,the cells are healthier so the battery will be good as new ?